Attachment for musical instruments



Sept. 24, 1929. J P, FRANCE 1,729,336

ATTACHMENT FOR MUSICAL INSTRUMENTS Filed May 2, 192'! IN I 'EN TOR. n) PFram e Y MW .tlil'l' @FFICE JOHN P. FRANCE, OF COLUEZ US, OHIO UNETESTATE.

, ATTACHMENT FOR MUSICAL INsTnUMnnTs i Application filed May a, 1927.Serial No. 188,235.

This invention relates to attachments for vice are not material, as theymust be changed anusieal instruments and more particularly to to suitthe bore and length of various instrudevices for changing the pitch ofbrass instruments. Change in the size of the bore ment -3+l affects thepitch more than any other 5 The object of the invention is to pro-ride aone factor, and the device can be readily addevice which may be slippedinto the bell justed to particular instrument by enlarging an ordinarybrass instrument, such a corthis bore to the proper size for thatinstrunet, to change the pitch of the instrument for ment. xample from Bflat to C, The hell 5 opens directly from the bore Another object of theinvention to proat r and "functions in relation to this bore 00 videsuch an attachment which. will change in exactly the same manner as theusual bell the pitch of the instrument without requiring of theinstrument does in relation to the usual any change in the position ofthe tuning-slides bore. This wall may be made in any usual of the valvesof the instrument. form so long as it does not become unsightly Otherand more particular objects of the or cumbersome. 65 invention willhereinafter appear. The taper 2 performs two functions, it

The drawing illustrates the device, in secserves to concentrate thesound into the bore tion, as fitted in the bell of a cornet or simiat 8and at the same time it prevents the lar instrument. formation of a nodeat the rear of the device.

The ordinary pitch-changing devices, usu- Having thus described myinvention, what 0 ally consisting of adjustable or interchange- I claimis able slides which change the length of the 1. Means for raising thepitch of a wind pipe, require that every Valve of the instrumusicalinstrument having an outwardly ment be tuned as well as that thefundamental flared. bell, consisting of a member shaped of theinstrument be changed. to lit within the bore of said instrument at 7 Inmy device, in contrast, I make use ot the bell, said member having anarrow, the well-known phenomenon that an appreci tapered bore and theinner end of said memable decrease in the diameter of a pipe causes herhaving a recess tapered toward said bore. a change in pitch, to avoidthe above di'lli- 2. Means for raising the pitch of a wind culty. Thiseffect is now made use of particumusical instrument having an outwardlylarly in piccolos, where the bOl is constricted flared. bell, consistingof a member shaped to toward the outer end in 0rd r that it may be litwi hin the bore of said instrument at the made sufficiently long toprovide room for bell, said member having a relatively small the keysand at the same time be of the proper bore increasing in size toward theouter end 35 pitch. By the use of a corresponding conand the inner endof said member having a striction at the bell of a brass instrument, 1recess tapered toward said bore. find that the pitch of the instrun'ientcan be 3. Means for raising the pitch oil a wind raised, for example,from B flat to C, and that musical instrument having an outwardly theconstriction also produces a proportionflared bell, consisting oi amember shaped to 40 ate effect on the sections of the tube cut in by litwithin the bore of said instrument atthe the valves, so that it isunnecessam to tune. bell, said. member having a narrow, tapered theseseparately. bore, bell on the outer end thereof, and the The drawingillustrates the preferred inn r end of said member having a recesstaform of my device, in which 1 is a tapered pered toward said bore.

45 portion adapted to lit snugly within the bore l. Means for raisingthe pitch of a wind of the instrument at the bell, 2 is a taperedmusical instrument having an outwardly recess leading to the restrictedbore 3, flared bell, consisting of a member shaped to which in turn isincreased in size toward the t within the bore of said instrument at theend 4, where it emerges intoi hell 5. bell, said n'lember having a relatvely small as The exact sites and 3ropertio of the debore line ing' insize toward tlit minim end,

a bell on the outer end thereof, and the inner end 01 said member havinga recess tapered toward said bore.

In testimony whereof I have afiixed my signature.

JOHN P. FRANCE.

